Nephilim master(Male reader x Fate Grand Order harem)

Haft Angel and Haft Demon and odd combination don't you think but it was possible his parents were able to do it and gave birth to the nephilim but both of there sides weren't having it so to save the child they stricken a deal with the leader of courter guardians Alaya to save there child has she save him there parents dealt with the angels and demons that were after them sadly dying in battle but at least there son Y/N live has alaya send him to present time there he was taken in by the L/N family were was raised and when was older he started to unlock his abilities and when demons appeared in his town he made his job taking them down and that's how he lived has a mercenary to kill demons that was until Alaya came looking for his help to save time

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